<!DOCTYPE html>
<html manifest="cacheData.manifest">
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<script>	

var appCache = window.applicationCache;  
//请求manifest文件时返回404或410，下载失败  
//或manifest文件在下载过程中源文件被修改会触发error事件  
appCache.addEventListener('error', handleCacheError, false);  
function handleCacheError(e) {  
    alert('Error: Cache failed to update!');  
};  


	
</script>
</body>
</html> 
